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I believe you are not correct.
The item CTD mentions is no prohibited, therefore it should be OK to travel in hand luggage.
Given what I have noted airside of baggage handling; no way would my two 500 g tubs have travelled in my checked baggage. Why volunteer for them to be drop kicked and oil throughout my clothing.
Why should they be not carried anyway? Like CTD my hand luggage was under dimension and under weight - compared to those trying to weightlift cases and somehow fit them into the overhead lockers.
The problem is not CTD diverting people from finding criminals, it is a lack of training and ability to determine facts at the screening point. Do not blame the victims for the failings of the system please. Common sense is fixing the system, not further erodong the rights of the good peoples.